CN116792128A - Lapping device, anchor rod trolley and method for laying protective net - Google Patents

Abstract

The application discloses a lapping device for installing a protective net on a tunnel vault, which comprises a support frame and a plurality of tensioning pieces, wherein the support frame comprises a middle base and two movable arms which are respectively positioned at two sides of the base and have an unfolding state and a folding state, and the shape of the support frame is adapted to the tunnel vault when the two movable arms are unfolded; the plurality of tensioning pieces are arranged on the support frame in parallel, the tensioning pieces extend along the direction perpendicular to the plane where the support frame is located, and when the support frame is used, the tensioning pieces extend along the depth direction of a tunnel and tension the protective net along with the expansion of the movable arm. The movable arm can be moved in the tunnel in a folding state, and can be switched to an unfolding state when being paved, so that the arch crown can be paved once, anchoring and fixing are performed after paving is finished, and the net hanging operation efficiency is improved.

Description

Lapping device, anchor rod trolley and method for laying protective net

Technical Field

The application relates to the technical field of tunnel supporting equipment, in particular to a compact and efficient net laying device, an anchor rod trolley and a method for laying a protective net.

Background

The primary tunnel support is mainly used for hanging nets and anchoring the rock wall of a tunnel to strengthen the rock wall after the tunnel is excavated, and prevents broken stones from loosening and falling to hurt personnel or equipment. For the screening device, for example, patent document CN 218376504U discloses a screening mechanical arm and its anchor trolley, which are small in size to enter tunnels of various sizes, in order to be able to enter tunnels. However, in the process of net hanging, especially when net hanging is carried out on an arc-shaped vault, due to the self structural limitation, only a certain distance can be hung firstly, then anchoring is carried out, a certain distance is continuously moved, and the construction time for net hanging on the tunnel vault is long due to repetition.

Disclosure of Invention

The application provides a net laying device which is compact in structure and improves the efficiency of net hanging operation.

The application provides a lapping device for installing a protection net on a tunnel vault, which comprises the following components:

the support frame comprises a middle base and two movable arms which are respectively positioned at two sides of the base and have an unfolding state and a folding state, and when the two movable arms are unfolded, the shape of the support frame is adapted to the tunnel vault;

the tensioning pieces are arranged on the supporting frame in parallel, and extend along the depth direction of the tunnel when the protective net is used, and the protective net is tensioned along with the expansion of the movable arm.

The following provides several alternatives, but not as additional limitations to the above-described overall scheme, and only further additions or preferences, each of which may be individually combined for the above-described overall scheme, or may be combined among multiple alternatives, without technical or logical contradictions.

Optionally, the movable arm is rotatably connected with the base.

Optionally, the movable arm is of a multi-section structure, and two adjacent sections are in rotary connection.

Optionally, in the folded state, the sections of the movable arm are brought together.

Optionally, the segments of the movable arm are arranged offset in a horizontal direction.

Optionally, a first driving device for driving the two sections to rotate relatively is arranged at the joint of the two adjacent sections.

Optionally, the device comprises a second driving device for driving the two movable arms to rotate towards each other to be close or open.

Optionally, the tensioning piece is in a rod-shaped structure and is arranged on the outer side of the supporting frame.

Optionally, the device comprises a connecting arm connected with the base and extending along the same direction with the tensioning piece, and a supporting piece for fixing the adjacent tensioning piece is arranged on the connecting arm.

Optionally, a roller for winding the protection net is included, wherein the roller is arranged on the two tighteners at the most edge.

The application also provides an anchor rod trolley which comprises any one of the above-mentioned lapping devices and an operating arm connected with the lapping devices.

The application also provides a method for paving the protective net on the tunnel vault, which comprises the following steps:

providing a support frame with two movable arms, wherein a plurality of tensioning pieces are arranged on the support frame in parallel;

in a folded state, hanging the protective net on part of the tensioning pieces;

the movable arm is extended while the protective mesh is unwound and spread to accommodate the tunnel vault.

According to the net laying device, the movable arm can be moved in the tunnel in a folded state, and can be switched to an unfolded state during net laying, so that one-time laying of the vault is realized, anchoring and fixing are carried out after the laying is finished, and net hanging operation efficiency is improved.

Drawings

FIG. 1 is a perspective view of a movable arm of a lapping device of an embodiment of the present application in a folded state;

FIG. 2 is an exploded view of the segments of one of the movable arms of FIG. 1;

FIG. 3 is a front view of the protective net and pull rope loaded in FIG. 1;

FIG. 4 is a perspective view of the movable arm of FIG. 1 in an expanded state;

FIG. 5 is a front view of the lapping device of FIG. 4 loaded with a protective mesh;

FIG. 6 is a schematic illustration of the mating of the lapping device of FIG. 5 with a tunnel vault;

FIG. 7 is a schematic view of a lapping device connected to an operating arm according to an embodiment of the present application;

FIG. 8 is a schematic view showing the connection between the lapping device and the protection net in a folded state according to an embodiment of the present application;

fig. 9 is a schematic view of the expanded state of the laying device of fig. 8.

Reference numerals in the drawings are described as follows:

1000. a lapping device; 100. a support frame; 101. an outer side; 102. an inner side;

110. a base; 120. A movable arm; 121. Segments;

130. a connecting arm; 131. A support;

141. a first hinge portion; 142. A second hinge portion; 143. A third hinge portion;

151. a first driving device; 152. A second driving device;

180. a pull rope; 190. A protective net;

200. a tensioning member; 201. a first side; 202. a second side;

300. a bolt; 400. a winding device;

500. a vault; 510. a sidewall; 600. an operation arm; 700. and (3) a roller.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

In the present disclosure, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or as implicitly indicating the number, order of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

The existing tunnel includes a dome having a curved cross-sectional shape and sidewalls 510 connected to both sides of the dome, the sidewalls having a substantially straight cross-sectional shape.

Referring to fig. 1 to 6, the present application provides a net laying apparatus 1000 for installing a protection net 190 on a tunnel vault 500, anchoring the protection net 190, and finally fixing the protection net 190 on the vault 500 to prevent crushed stones from falling. The lapping device 1000 includes a support frame 100 and a plurality of tensioning members 200, wherein the support frame 100 includes a base 110 located in the middle, and two movable arms 120 respectively located at two sides of the base 110 and having an unfolded state and a folded state, and when the two movable arms 120 are unfolded, the shape of the support frame 100 is adapted to the tunnel vault 500 (as shown in fig. 5 and 6); the tensioning members 200 are arranged in parallel on the support frame 100, and in use, the tensioning members 200 extend in the tunnel depth direction (hereinafter referred to as horizontal direction) and tension the protection net 190 as the movable arms 120 are deployed. For convenience of explanation, the lapping device 1000 has a length L, a width W, and a height H as shown in the drawing, the length L and the horizontal direction being the same.

The plane where the supporting frame 100 is located is a tunnel cross section, the tensioning pieces 200 are arranged in parallel and at intervals and supported on the protection net to be basically attached to the tunnel vault, and the space between the tensioning pieces 200 at intervals can be used for installing (i.e. anchoring operation) the anchor rod 300.

The support 100 has an outer side 101 adjacent the tunnel dome and an opposite inner side 102, "compatible" being understood as: the outer profile of the support 100 is curved to conform to the shape of the tunnel dome so that all the tension members act on each location of the curve, ultimately causing the protective mesh to substantially conform to the tunnel dome. The extending direction of the tensioning piece is the same as the depth direction of the tunnel (the extending direction of the short distance of the tunnel is approximately a straight line), and the protective net with a larger area can be paved at one time.

The lapping device can finish large-area lapping operation of the tunnel vault at one time, and improves the operation efficiency. If the net laying device does not carry out net hanging operation, the movable arm can be switched to a folding state, the width of the plane where the net laying device is located is greatly reduced, and the movement in a tunnel is facilitated.

The movable arm 120 is movably connected to the base 110, for example, sliding or in an embodiment, the movable arm 120 is rotatably connected to the base 110, as shown in fig. 1 and 4, and in the folded state of the support 100, the two movable arms 120 are close to each other, and the outer contour of the whole device is substantially rectangular.

In a specific embodiment, the movable arm 120 has a multi-segment structure, and two adjacent segments 121 are rotatably connected. Wherein the sections 121 of the movable arm 120 are brought together in a folded state, reducing the width dimension of the lapping device. Specifically, the movable arm 120 and the base 110 have hinge portions between adjacent segments 121 and spaced apart hinge portions having a mutual approach in a folded state, and as shown in fig. 1 and 2, the movable arm 120 includes three segments 121 and has a first hinge portion 141, a second hinge portion 142, and a third hinge portion 143, and in the folded state, the first hinge portion 141 and the third hinge portion 143 are adjacent to each other.

Wherein the individual segments 121 of the movable arm 120 are arranged offset in the horizontal direction. Allowing partial or complete overlap between the individual segments 121 as shown in fig. 3, further reducing the width dimension of the lapping device in the folded condition. And each segment 121 can be unfolded/folded simultaneously with the movable arm 120 itself, without limitation of the movement sequence, reducing the time required for unfolding.

In one embodiment, a first driving device 151 is provided at the junction of two adjacent segments 121 to drive the two to rotate relative to each other. The first driving device 151 is a motor, specifically, the motor is installed at the end of one segment, the end of the adjacent segment is directly connected with the output shaft of the motor, when the motor is unfolded or folded, the motor works to drive one segment to rotate relative to the other segment, and the rotation direction can be directly controlled by the motor.

In one embodiment, the lapping device 1000 includes a second drive 152 that drives the two moveable arms 120 toward and away from each other. The second driving means 152 may be a motor or an oil cylinder, etc., and the second driving means 152 is preferably an oil cylinder in consideration of the installation of the tension member (described in the following embodiments) and the weight of the movable arm 120, wherein the oil cylinder includes a cylinder body having one end fixed to the base 110 and a piston movably coupled with the cylinder body and one end connected to the base rotating-coupled section 121.

In one embodiment, the tensioning member 200 is a rod-like structure, specifically a straight rod, that is mounted on the outside of the support 100 that also includes the hinge between adjacent segments 121. Wherein the number of tensioners mounted to base 110 or segment 121 is one or more.

The lapping device 1000 is generally installed on a carrier, so that mobile construction is facilitated, in an embodiment, the lapping device 1000 includes a connecting arm 130 connected with a base 110 and extending along the same direction as the tensioning members, two tensioning members 200 are symmetrically fixed on the base 110 in the drawing, a supporting member 131 for fixing the tensioning members 200 of the station is provided on the connecting arm 130, the supporting member 131 is formed by connecting one or more sheet bodies, and at least two supporting positions of the tensioning members 200 are provided, so that the laying of the protection net is more stable. The connecting arm 130 is connected to the carrier by other means such as an operating arm. The two tensioning members 200 are close to the hinge joint of the movable arm 120 and the base 110, so that space is limited, and therefore, the second driving device adopts an oil cylinder, and space layout is more flexible.

The tensioning member 200 has a first side 201 and a second side 202 opposite to the base 110, the length of the tensioning member 200 located on the first side 201 is greater than that of the second side 202 where the tensioning member is located, the connecting arm 130 is disposed on the first side 201, so that space is fully utilized, and the length of the lapping device 1000 is reduced.

As shown in fig. 8 and 9, in one embodiment, the lapping device 1000 includes rollers 700 provided at the most edge two tension members 200 for winding the protection net 190. When the lapping operation is performed, the supporting frame is in a folded state, the roller 700 is wound around two side edges of the protective net 190, and the rest part of the protective net 190 is hung on the rest tensioning pieces; when the support frame is unfolded, the movable arm drives each tensioning piece to move, and the tensioning piece 200 (except for the two most edge tensioning pieces) tensions the protective screen 190, drives the roller 700 to rotate and adaptively unwinds the winding part of the protective screen 190 until the protective screen is adapted to a tunnel vault.

The application provides a method for paving a protective net on a tunnel vault, which comprises the following steps:

s100, providing a support frame with two movable arms, wherein a plurality of tensioning pieces 200 are arranged on the support frame in parallel;

s200, hanging the protective net on part of the tensioning pieces in the folded state;

and S300, the movable arm stretches, and the protective net is unreeled and spread to adapt to the tunnel vault.

In one embodiment, the method may be practiced with the lapping apparatus of the above embodiments.

As shown in fig. 7, the present application further provides a bolting jumbo, which includes an operation arm 600 connected to the lapping device 1000, wherein the operation arm 600 can be connected to the base 110 or the connection arm 130, thereby improving construction efficiency.

The anchor bar trolley further comprises a winding device 400 for winding the storage protection net 190 and a driving device (not shown) for unwinding the winding device 400 such that the protection net 190 is laid on the plurality of tension members 200.

In one embodiment, the anchor rod trolley is provided with an existing net hanging device for carrying out net hanging operation on the side wall of the straight face.

The following describes the net hanging operation of the net laying device of the present application in detail:

first, the lapping device moves in a folded state along with a carrier (e.g., a trolley), on which a winding device 400 for winding a protection net is provided, and a pull rope 180 connected to one end of the protection net 190, the pull rope 180 being wound around each tension member placed in the folded state along fig. 3, and the other end of the pull rope 180 being pulled by a driving device.

In the process of the net hanging operation, as shown in fig. 5, the net laying device is lifted to be close to the tunnel vault, the first driving device and the second driving device work, the support frame is unfolded, the driving device work pulls the protection net to pass through each tensioning piece while or after the support frame is unfolded, then the net laying device is lifted to be close to the tunnel vault as much as possible, and finally the anchoring operation is performed.

According to the net laying device, the movable arm can be moved in the tunnel in a folded state, and can be switched to an unfolded state during net laying, so that one-time laying of the vault is realized, anchoring and fixing are carried out after the laying is finished, and net hanging operation efficiency is improved.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description. When technical features of different embodiments are embodied in the same drawing, the drawing can be regarded as a combination of the embodiments concerned also being disclosed at the same time.

The foregoing examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application.

Claims (12)

1. A lapping device for installing a protection net on a tunnel vault, comprising:

the support frame comprises a middle base and two movable arms which are respectively positioned at two sides of the base and have an unfolding state and a folding state, and when the two movable arms are unfolded, the shape of the support frame is adapted to the tunnel vault;

the tensioning pieces are arranged on the supporting frame in parallel, and extend along the depth direction of the tunnel when the protective net is used, and the protective net is tensioned along with the expansion of the movable arm.

2. The lapping device of claim 1, wherein the moveable arm is rotatably connected to the base.

3. The lapping device of claim 2, wherein the movable arm is of a multi-segment construction, with a rotational connection between adjacent segments.

4. A lapping device as claimed in claim 3, wherein in the folded condition the sections of the moveable arm are brought together.

5. The lapping device of claim 4, wherein the segments of the moveable arm are offset in a horizontal direction.

6. A lapping device according to claim 3, wherein a first drive means is provided at the junction of two adjacent segments to drive the two in relative rotation.

7. A lapping device as claimed in claim 2, comprising a second drive means for driving the two moveable arms towards each other to rotate towards each other or to spread.

8. The lapping device of claim 1, wherein the tensioning member is a rod-like structure disposed outside of the support frame.

9. A lapping device as claimed in claim 1, comprising a connecting arm connected to the base and extending in the same direction as the tensioning member, the connecting arm being provided with a support member to which an adjacent tensioning member is secured.

10. The lapping device of claim 1, comprising rollers provided on the two outermost tension members for winding the protective mesh.

11. A trolley comprising a lapping device according to any one of claims 1 to 10 and an operating arm connected to the lapping device.

12. The method for paving the protective net on the tunnel vault is characterized by comprising the following steps of:

providing a support frame with two movable arms, wherein a plurality of tensioning pieces are arranged on the support frame in parallel;

in a folded state, hanging the protective net on part of the tensioning pieces;

the movable arm is extended while the protective mesh is unwound and spread to accommodate the tunnel vault.